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Description of business and basis of preparation of the consolidated financial statements - Corporate Reorganization (Details) - ARS ($) $ in Millions | Nov. 30, 2017 | Sep. 05, 2017 | Jul. 31, 2008
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Cubecorp |  |  |
Merger Information |  |  |
Percentage of voting equity interests acquired |  |  | 100.00%
Cubecorp | Secretary of Commerce Resolution No. 2017-656-APN-SECC # MP |  |  |
Merger Information |  |  |
Percentage of voting equity interests acquired |  | 100.00% |
Telecom Argentina |  |  |
Corporate Reorganization of the Telecom Group and Its controlling companies |  |  |
Net assets from the investment | $ 14 |  |
Net liabilities from the investment | $ 14 |  |

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